Stainless Steel Ferrule fitting MALE STUD CONNECTOR to size and design as per the Ermeto Order code GE22LR3/ 4KEGCF and material as per following: Body and nut shall be of Stainless steel to spec ASTM A479 TP 304 ( Bar Stock ) and ASTM A182 F 304 ( Forgings ). The ferrule shall be of stainless steel to spec ASTM A276 TP 316.